Retrospective long-term analysis of bone level changes after horizontal alveolar crest reconstruction with autologous bone grafts harvested from the posterior region of the mandible

Abstract

PurposeThe goal of this study was to evaluate the long-term success of horizontal alveolar crest augmentation of the retromolar region of the mandible with particulated bone, as well as factors affecting subsequent peri-implant bone loss.MethodsA total of 109 patients (68 female, 41 male) suffering from alveolar ridge deficiencies of the maxilla and mandible were included in this study. All patients were treated with particulated retromolar bone grafts from the mandible prior to the insertion of endosseous dental implants. Mesial and distal peri-implant crestal bone changes were assessed at six time points. Several parameters, including implant survival and the influence of age, gender, localisation of the implant, diameter, covering procedures, and time points of implant placement, were analysed to identify associations with bone level changes using the Mann-Whitney U-test, the Kruskal-Wallis test, and Spearman's rank-order correlation coefficient.ResultsA total of 164 dental implants were placed in the maxilla (n=97) and in the mandible (n=67). The mean observation period was 105.26±21.58 months after implantation. The overall survival rate was 97.6% after 10 years. Overall, peri-implant bone loss was highest during the first year, but decreased over time. The mean amount of bone loss after 10 years was 2.47 mm mesially and 2.50 mm distally. Bone loss was significantly influenced by implant type and primary stability.ConclusionsThe use of particulated autologous retromolar bone grafts is a reliable technique for the horizontal reconstruction of local alveolar ridge deficiencies. Our results demonstrate that implants placed in augmented bone demonstrated similar bone level changes compared to implants inserted in non-augmented regions.

Analysis of the Factors Affecting Surgical Success of Implants Placed in Iranian Warfare Victims

“…The survival rate was 97s%. They concluded that implants placed in augmented bone gave similar results to implants inserted in nonaugmented regions [ 8 ]. Degidi et al [ 9 ] reported a higher success rate of approximately 97.7s% for 133 short dental implants that were immediately loaded.…”

Computed Tomography-Guided Bone Block Harvesting From the Mandibular Ramus

“…Bone graft blocks from the mandibular ramus have been widely used in small bone reconstructions prior to the installation of dental implants (Voss et al, 2016), which have shown high success rates of implants installed in grafted sites (Clementini et al, 2011). Peñarrocha-Oltra et al (2014, in a study conducted on 37 patients, showed a 91 % success rate of dental implants in sites augmented with bone from the mandibular ramus.…”

The Use of the Mandibular Ramus for Alveolar Reconstruction in Oral Implantology

“…Of the 11 articles analyzed, 9 were prospective and 2 were retrospective. In all the studies, implant installation was delayed; i.e., healing time was expected after graft placement, which was 3 to 5 months in the study by Soehardi et al (2009), 4 months in the works by Happe (2007), Cordaro et al (2011) and Streckbein et al (2014), 4 to 5 months in the studies by Restoy-Lozano et al (2015) and Sakkas et al (2016); 5 months in the work by Singh et al (2013), and 4 to 6 months in the study by Voss et al (2016). On the other hand, in the works by Prousaeffs et al (2002) and Greenberg et al (2012), the expected time was 6 months, whereas in the work by Peñarrocha-Oltra et al (2014) it was 7 months.…”